So. GRDS. Is the Uneo Maxx for DIY enthusiasts an excellent device, for that reason alone, because, among other things, the drill head and the pneumatic identical to that of Hilti (Bosch produced just nunmal for Hilti!). Drilling in concrete walls is (of course with the appropriate drill) butterweich. Battery performance is like weight and craftmanship of household more than adequate, no cause for complaints. The Uneo Maxx is the purchase without battery is not a comic, but a very praiseworthy philosophy of Bosch. All equipment of 18 V - Bosch family can be purchased with or without battery. For example, I still to 18V cordless screwdriver from Bosch with 2nd battery, so that I can buy much less expensive battery without any other devices always.